Earthquake with magnitude of ML 1.0 on date 31-05-2021 and time 05:42:26 (Italy) in region 10 km NW Milo (CT)

A magnitude ML 1.0 earthquake occured in region: 10 km NW Milo (CT), on

  • 31-05-2021 03:42:26 (UTC)
  • 31-05-2021 05:42:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.778, 15.031 at 21 km depth.

The earthquake was located by: Sala Operativa INGV_OE (Catania).

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Milo CT 10 1087 1087
Sant'Alfio CT 11 1582 2669
Zafferana Etnea CT 11 9517 12186
Linguaglossa CT 12 5403 17589
Piedimonte Etneo CT 13 3963 21552
Randazzo CT 14 10900 32452
Moio Alcantara ME 14 717 33169
Santa Venerina CT 14 8592 41761
Castiglione di Sicilia CT 14 3215 44976
Giarre CT 15 27659 72635
Mascali CT 15 14282 86917
Maletto CT 16 3920 90837
Fiumefreddo di Sicilia CT 16 9623 100460
Malvagna ME 16 733 101193
Riposto CT 16 14838 116031
Santa Domenica Vittoria ME 17 980 117011
Francavilla di Sicilia ME 17 3945 120956
Roccella Valdemone ME 17 666 121622
Bronte CT 17 19172 140794
Pedara CT 18 14102 154896
Nicolosi CT 18 7463 162359
Calatabiano CT 18 5308 167667
Ragalna CT 18 3924 171591
Motta Camastra ME 18 845 172436
Trecastagni CT 18 10910 183346
Gaggi ME 19 3184 186530
Viagrande CT 19 8563 195093

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NW of Acireale (52622 inhabitants)
31 Km N of Catania (314555 inhabitants)
65 Km SW of Reggio di Calabria (183035 inhabitants)
65 Km SW of Messina (238439 inhabitants)
83 Km N of Siracusa (122291 inhabitants)
91 Km E of Caltanissetta (63360 inhabitants)
98 Km N of Ragusa (73313 inhabitants)
Recent and historical seismicity
Seismic hazard
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire ( that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
ML 1.0 2021-05-31
37.778 15.031 21 2021-05-31
Sala Operativa INGV_OE (Catania) 90650221
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-05-31 03:42:26
Latitude 37.7780
Longitude 15.0310
Depth (km) 21 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-CT#SeismPicker_SO-OE
Event type earthquake
Origin ID 90650221


Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 800
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.07
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitude information


Field Value
Value 1
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 90650221
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-05-31 03:54:33
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download